Freeport, Illinois Climate
United States
Pop. 24,476 Elev. 237 m / 778 ft
TZ: America/Chicago (UTC-5) ·
Freeport is largely arid, with warm summers peaking at 85°F (29°C) in July and cold winters around 14°F (-10°C) in January. Humidity pushes the summer feels-like temperature to 93°F (34°C), while wind chill can drive winter lows to 5°F (-15°C). Precipitation occurs on roughly 40 days per year (30.3 in / 769 mm total), with snow on 5 days and 36 in (903 mm) of annual accumulation. The city averages 120 sunny days per year and around 31 thunderstorm days. Nearby lake water reaches 77°F (25°C) in summer.
| Temperature | 85°F (29°C) high | 14°F (-10°C) low |
| Feels like | 93°F (34°C) high | 5°F (-15°C) low |
| Rain | 40 days | 30.3 in (769 mm) /yr |
| Snow | 5 days | 35.5 in (903 mm) /yr |
| Sky | 120 sunny | 31 stormy |
| Wind | 2.4 mph (1.1 m/s) avg |
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Explore on the MapMonthly Climate Chart
Best months to visit: Apr, May, Sep, Oct
Sky & Air by Month
Cloud cover (%)
52
Jan 63
Feb 55
Mar 67
Apr 57
May 53
Jun 59
Jul 52
Aug 40
Sep 46
Oct 56
Nov 76
Dec Humidity (%)
60
Jan 65
Feb 60
Mar 61
Apr 60
May 65
Jun 74
Jul 73
Aug 68
Sep 66
Oct 67
Nov 76
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 28 mi Chicago Rockford International Airport (RFD)
Ski resort 52 mi Tyrol Basin Ski And Snowboard Area
National park 93 mi Pikes Peak State Park
Hospital 1 mi MercyHealth FHN Memorial Hospital
Hiking trail 25 mi Timber Edge
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 30°F -1°C | 14°F -10°C | 0.3 in 9 mm | 2.0 in52 mm | 13 |
| February | 33°F 0°C | 17°F -8°C | 0.2 in 5 mm | 7.5 in192 mm | 6 |
| March | 56°F 13°C | 34°F 1°C | 3.1 in 78 mm | 8.2 in208 mm | 9 |
| April | 61°F 16°C | 42°F 5°C | 3.0 in 77 mm | 0.1 in2 mm | 4 |
| May | 70°F 21°C | 50°F 10°C | 3.2 in 81 mm | — | 12 |
| June | 84°F 29°C | 64°F 18°C | 5.0 in 127 mm | — | 10 |
| July | 85°F 29°C | 68°F 20°C | 5.9 in 150 mm | — | 9 |
| August | 80°F 26°C | 62°F 17°C | 4.0 in 102 mm | — | 14 |
| September | 78°F 26°C | 56°F 13°C | 1.9 in 47 mm | — | 16 |
| October | 67°F 19°C | 48°F 9°C | 1.6 in 39 mm | — | 12 |
| November | 49°F 9°C | 34°F 1°C | 0.8 in 21 mm | 10.7 in273 mm | 11 |
| December | 32°F 0°C | 18°F -8°C | 1.3 in 34 mm | 6.9 in176 mm | 4 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 13 | 0 |
| February | 6 | 0 |
| March | 9 | 3 |
| April | 4 | 2 |
| May | 12 | 1 |
| June | 10 | 6 |
| July | 9 | 8 |
| August | 14 | 5 |
| September | 16 | 4 |
| October | 12 | 1 |
| November | 11 | 0 |
| December | 4 | 1 |
Water Temperatures Data
↑ See chart| Month | Lake Avg High |
|---|---|
| January | 32°F 0°C |
| February | 32°F 0°C |
| March | 38°F 3°C |
| April | 49°F 9°C |
| May | 58°F 15°C |
| June | 70°F 21°C |
| July | 77°F 25°C |
| August | 74°F 23°C |
| September | 67°F 19°C |
| October | 59°F 15°C |
| November | 42°F 6°C |
| December | 32°F 0°C |